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Functional encryption provides more sophisticated and flexible relations between the encryption-key and decryption-key. Previous FE systems only allow for functionalities that take in a single authority key and plaintext as inputs. In this paper, a Multiple-Authority-Keys Attribute-Based Encryption system is presented. The new propose scheme allows descriptor to learn functionalities that take in...
Proxy re-encryption (PRE) allows a ciphertext computed under Alice's public key to be transformed to those which can be decrypted by Bob. Since Blaze et al. introduced the concept of proxy re-encryption in Eurocrypt'98, there are many results on proxy re-encryption. However, all the proxy re-encryption schemes proposed until now assume the proxy having no its own public/private keys. In this paper,...
Blind signature is very important technology in secure e-commerce. Certificateless public key cryptography avoids the using of certificate in certificate-based public key signature scheme and removes key escrow in ID-based signature scheme. In this paper we introduce the notion of blind signature into certificateless public key cryptography and propose a concrete certificateless blind signature scheme...
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